How To Downgrade Back To 2.2.1???

I Had It With This 3.0....well For Atleast Nothing I Seems To Work Right Now... Im Sure In Time It Will All Be Fix ..but For Now Can Any One Tell Me How To Dump This 3.0 And Go Back To The 2.2.1.....i Have Tried A Few Times But An Error Code Comes Up..i Think It Was 20 And A Other It Was 1600...any Help Woul Be Nice Thanks
:d

YOU ARE RIGHT IT IS PRETTY SOLID BUT SOME OF THE APPS DONT WORK RIGHT I WAS JUST GOING BACK FOR A WHILE UNTIL THE UPDATES R OUT.... BUT I GAVE UP ON THAT TOOO GOING BACK TO THE 2.2.1 IT SEEM LIKE THERES NO WAY I HAVE TRIED ABOUT 7 TIMES NO LUCK .....SO IT LOOKS LIKE IM GOING TO HAVE TO WAIT I WILL HAVE TO CALL SOME GIRLS TILL THEN THANKS FOR THE INFO